同位素

The element we're interested in is Radon-222 (there is another form, Radon-218, but the half-life of this isotope is only a few hundredths of a second, so it is less of a problem).

元素我们感兴趣的是氡- 222 （还有另一种形式，氡- 218 ，但半衰期同位素这是只有少数几个百分之一秒，所以它不是一个问题）。

The probable application of hydrogen isotopes and metal hydrides to future energy source is reviewed.

评述了氢同位素与金属氢化物在未来能源中的应用。

The stability of Pt-SDB on its catalytic activity and the Pt contained in Pt-SDB have been studied during three years in isotopic exchange between tritium oxide and hydrogen.

引言在对含放射性氚水的处理过程中，基于液相水-氢同位素催化交换的工艺已开始应用。

The distribution of Pb and 〓 in snow along two major trajecteries of ice stream (Trans-polar Drift Stream and Beaufort Gyre) indicates that the tracks of pollution airmasses invading Central Arctic Ocean are mainly from Eurasia and Northwest America.

大尺度海冰流上覆积雪中记录了洋流途经海域的大气环境信息，是监测现代大气环境的有效介质。北冰洋不同海冰流上覆积雪内nss Cl〓、nss SO〓、Pb及其稳定同位素比率等的分布，显示两大海冰流积雪化学具有明显差异，并据此判断影响北冰洋中心地带冬春季大气环境的中低纬污染气团主要源于欧亚大陆和北美洲西部。

Based on the data of directional core drilling, FMI, routine cores and their thinsections, we have described the characteristics of H3 reservoir in Anpeng oil field, Miyang sag. By analyzing the stable isotopes of 20 fracture infillings and 5 groups of acoustic emission, combined with the studies of fracture characteristics and tectonic evolution, the fractures in H3 member were assigned to the regional fracture type which is characterized by the dominance of vertical or highangle extensional fracture, occurring in groups, relatively stable occurrences and out of the control of local nosetype folds. It has been recognized that there are 4 breaking stages, of which the 2nd one is the major stage.

根据定向取心、成像测井、常规岩心及薄片资料对安棚油田核三段储层天然裂缝特征进行分析的基础上，通过对20个裂缝充填物的稳定同位素测定，5组样品的声发射实验，结合岩心裂缝特征、地质构造历史等，确定出核三段地层中裂缝为区域性裂缝，以垂直或高角度张性缝为主，成组出现，产状稳定，不受局部鼻状构造控制，确定出裂缝有4个破裂期，主要破裂期为第二期。

The source of Fe was provided strong supporting evidence. Iron isotopic ration of BIF has the positive dependence ofδEu, indicating the source of Fe correlation with hydrothermal fluid.9. A model for Fe cycling.

首次从成矿元素本身为BIF的物质来源提供直接证据：BIF的Fe同位素成分与Eu异常存在非常明显地正相关关系，这清楚地表明鞍本地区BIF中铁的来源与海底火山热液活动有关。9。

The establishment of IDMS method for analysis of trace iron in red wine supports the certification of certified reference materials.

建立的红酒中痕量铁含量的同位素稀释质谱方法为标准物质的定值提供了技术支持。

After eliminating the isotopic backgrounds using the AMS technique, the isobars can be distinguished with their emitted characteristic X-rays when the projectile ions collide with target.

PX-AMS方法就是利用AMS技术排除同位素的干扰后，利用入射离子和特定靶材料碰撞时入射离子发射的特征X射线进行同量异位素鉴别。

An assumed Gaussian tail is addedonto the HO distribution. The calculations for〓 of the protron-rich isotones 〓〓 and 〓 and for 〓 the neutron-rich isotopes 〓were finished by theGlauber Model along with the modified density distrution. The calculated resultsshow that d values of these nuclei along with the modified density distribution arelower than the calculated ones along with the only HO density distribution.

为减小Glauber模型计算的反应截面与实验值的差别，本论文还对Glauber模型的输入密度形式进行了修改，在原单-HO分布基础上加一个高斯分布的尾巴，并对丰质子的同中子素核〓及〓与〓靶以及〓和丰中子的C同位素核〓与〓靶的反应截面重新进行了计算，结果显示在中能区的计算值比原来单一密度分布的计算结构有明显改善。

We consider isotopes of great use for our research work.

我们认为同位素对研究工作很有用。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。